I've turned off the offer button in my closet, prolly best thing I ever did. I do negotiate with my buyers, but just like before on Tradesy, (my experience was remarkably similar to yours), only some buyers do this, gotta be honest, the majority of the times, they paid my list prices. I do keep pricing v competitive, and my inventory did move briskly so I wasn't just listing my stuff for display only.
was anxious about going rogue with no offer button, but my instincts proved right and while my sales have slowed down during this migration transition, I achieved my targeted prices for things I sold during the past month. I've been selling on Tradesy for 6-7 years so I had customer data to back up my instincts. my focus is on primarily US buyers, couldn't careless about the European buyers unless I have a rare special item. when non American buyers attempt to negotiate with me, I always point out the obvious but little understood fact that they have to pay for import duties/customs that VC charges during check out. 99% of the time, they abandon the purchase.
I do get a strong impression that Tradesy buyers fail to convert to VC new account holders once they clicked on the links. There's reason why the VC interface didn't take off with American buyers even though VC have been around in the US just as long as Tradesy had. the sooner VC management acknowledge this vulnerability, the quicker they can address the elephant in the room and pivot accordingly.